Package org.drools.planner.core

Examples of org.drools.planner.core.Solver

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        }
        logger.trace("Benchmark inputSolution has been read for singleBenchmark ({}_{}).",
                problemBenchmark.getName(), solverBenchmark.getName() );

        // Intentionally create a fresh solver for every SingleBenchmark to reset Random, tabu lists, ...
        Solver solver = solverBenchmark.getSolverConfig().buildSolver();
        for (ProblemStatistic problemStatistic : problemBenchmark.getProblemStatisticList()) {
            SingleStatistic singleStatistic = problemStatistic.createSingleStatistic();
            singleStatistic.open(solver);
            singleStatisticMap.put(problemStatistic.getProblemStatisticType(), singleStatistic);
        }

        solver.setPlanningProblem(inputSolution);
        solver.solve();
        Solution outputSolution = solver.getBestSolution();

        timeMillisSpend = solver.getTimeMillisSpend();
        DefaultSolverScope solverScope = ((DefaultSolver) solver).getSolverScope();
        calculateCount = solverScope.getCalculateCount();
        score = outputSolution.getScore();
        SolutionDescriptor solutionDescriptor = ((DefaultSolver) solver).getSolutionDescriptor();
        planningEntityCount = solutionDescriptor.getPlanningEntityCount(outputSolution);
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            TerminationConfig originalTerminationConfig = solverBenchmark.getSolverConfig().getTerminationConfig();
            TerminationConfig tmpTerminationConfig = originalTerminationConfig.clone();
            tmpTerminationConfig.shortenMaximumTimeMillisSpendTotal(timeLeft);
            solverBenchmark.getSolverConfig().setTerminationConfig(tmpTerminationConfig);

            Solver solver = solverBenchmark.getSolverConfig().buildSolver();
            solver.setPlanningProblem(readPlanningProblem());
            solver.solve();

            solverBenchmark.getSolverConfig().setTerminationConfig(originalTerminationConfig);
            long timeSpend = System.currentTimeMillis() - startingTimeMillis;
            timeLeft = warmUpTimeMillisSpend - timeSpend;
            if (timeLeft <= 0L) {
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    private static ExecutorService solvingExecutor = Executors.newFixedThreadPool(4);

    public void setup(HttpSession session) {
        SolverFactory solverFactory = new XmlSolverFactory(
                "/org/drools/planner/examples/vehiclerouting/solver/vehicleRoutingSolverConfig.xml");
        Solver solver = solverFactory.buildSolver();
        session.setAttribute(VrpSessionAttributeName.SOLVER, solver);

        URL unsolvedSolutionURL = getClass().getResource("/org/drools/planner/webexamples/vehiclerouting/A-n33-k6.vrp");
        VrpSchedule unsolvedSolution = (VrpSchedule) new VehicleRoutingSolutionImporter()
                .readSolution(unsolvedSolutionURL);
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        session.setAttribute(VrpSessionAttributeName.SHOWN_SOLUTION, unsolvedSolution);
    }


    public void solve(final HttpSession session) {
        final Solver solver = (Solver) session.getAttribute(VrpSessionAttributeName.SOLVER);
        VrpSchedule unsolvedSolution = (VrpSchedule) session.getAttribute(VrpSessionAttributeName.SHOWN_SOLUTION);

        solver.setPlanningProblem(unsolvedSolution);
        solver.addEventListener(new SolverEventListener() {
            public void bestSolutionChanged(BestSolutionChangedEvent event) {
                VrpSchedule bestSolution = (VrpSchedule) event.getNewBestSolution();
                session.setAttribute(VrpSessionAttributeName.SHOWN_SOLUTION, bestSolution);
            }
        });
        solvingExecutor.submit(new Runnable() {
            public void run() {
                solver.solve();
            }
        });
    }
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            }
        });
    }

    public void terminateEarly(HttpSession session) {
        final Solver solver = (Solver) session.getAttribute(VrpSessionAttributeName.SOLVER);
        solver.terminateEarly();
    }
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                SolverBenchmarkResult result = solverBenchmarkResultList.get(resultIndex);
                TerminationConfig originalTerminationConfig = solverBenchmark.getSolverConfig().getTerminationConfig();
                TerminationConfig tmpTerminationConfig = originalTerminationConfig.clone();
                tmpTerminationConfig.shortenMaximumTimeMillisSpendTotal(timeLeft);
                solverBenchmark.getSolverConfig().setTerminationConfig(tmpTerminationConfig);
                Solver solver = solverBenchmark.getSolverConfig().buildSolver();
                File unsolvedSolutionFile = result.getUnsolvedSolutionFile();
                Solution unsolvedSolution = readUnsolvedSolution(xStream, unsolvedSolutionFile);
                solver.setPlanningProblem(unsolvedSolution);
                solver.solve();
                solverBenchmark.getSolverConfig().setTerminationConfig(originalTerminationConfig);
                long timeSpend = System.currentTimeMillis() - startingTimeMillis;
                timeLeft = warmUpTimeMillisSpendTotal - timeSpend;
            }
            logger.info("================================================================================");
            logger.info("Finished warmUp");
            logger.info("================================================================================");
        }
        for (SolverBenchmark solverBenchmark : solverBenchmarkList) {
            for (SolverBenchmarkResult result : solverBenchmark.getSolverBenchmarkResultList()) {
                // Intentionally create a fresh solver for every result to reset Random, tabu lists, ...
                Solver solver = solverBenchmark.getSolverConfig().buildSolver();
               
                File unsolvedSolutionFile = result.getUnsolvedSolutionFile();
                Solution unsolvedSolution = readUnsolvedSolution(xStream, unsolvedSolutionFile);
                solver.setPlanningProblem(unsolvedSolution);
                List<SolverStatistic> statisticList = getOrCreateStatisticList(unsolvedSolutionFileToStatisticMap, unsolvedSolutionFile);
                for (SolverStatistic statistic : statisticList) {
                    statistic.addListener(solver, solverBenchmark.getName());
                }
                solver.solve();
                result.setTimeMillisSpend(solver.getTimeMillisSpend());
                Solution solvedSolution = solver.getBestSolution();
                result.setScore(solvedSolution.getScore());
                for (SolverStatistic statistic : statisticList) {
                    statistic.removeListener(solver, solverBenchmark.getName());
                }
                writeSolvedSolution(xStream, solverBenchmark, result, solvedSolution);
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        runSpeedTest(unsolvedDataFile, scoreAttainedString, EnvironmentMode.REPRODUCIBLE);
    }

    protected void runSpeedTest(File unsolvedDataFile, String scoreAttainedString, EnvironmentMode environmentMode) {
        XmlSolverFactory solverFactory = buildSolverFactory(scoreAttainedString, environmentMode);
        Solver solver = solve(solverFactory, unsolvedDataFile);
        assertBestSolution(solver, scoreAttainedString);
    }
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        return solverFactory;
    }

    private Solver solve(XmlSolverFactory solverFactory, File unsolvedDataFile) {
        Solution planningProblem = solutionDao.readSolution(unsolvedDataFile);
        Solver solver = solverFactory.buildSolver();
        solver.setPlanningProblem(planningProblem);
        solver.solve();
        return solver;
    }
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    public static void main(String[] args) {
        // Build the Solver
        SolverFactory solverFactory = new XmlSolverFactory(
                "/org/drools/planner/examples/cloudbalancing/solver/cloudBalancingSolverConfig.xml");
        Solver solver = solverFactory.buildSolver();

        // Load a problem with 400 computers and 1200 processes
        CloudBalance unsolvedCloudBalance = new CloudBalancingGenerator().createCloudBalance(400, 1200);

        // Solve the problem
        solver.setPlanningProblem(unsolvedCloudBalance);
        solver.solve();
        CloudBalance solvedCloudBalance = (CloudBalance) solver.getBestSolution();

        // Display the result
        System.out.println("\nSolved cloudBalance with 400 computers and 1200 processes:\n"
                + toDisplayString(solvedCloudBalance));
    }
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    public static void main(String[] args) {
        // Build the Solver
        SolverFactory solverFactory = new XmlSolverFactory(
                "/org/drools/planner/examples/nqueens/solver/nqueensSolverConfig.xml");
        Solver solver = solverFactory.buildSolver();

        // Load a problem with 8 queens
        NQueens unsolved8Queens = new NQueensGenerator().createNQueens(8);

        // Solve the problem
        solver.setPlanningProblem(unsolved8Queens);
        solver.solve();
        NQueens solved8Queens = (NQueens) solver.getBestSolution();

        // Display the result
        System.out.println("\nSolved 8 queens:\n" + toDisplayString(solved8Queens));
    }
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Related Classes of org.drools.planner.core.Solver

  • org.drools.planner.benchmark.core.ProblemBenchmark
  • org.drools.planner.benchmark.core.SingleBenchmark
  • org.drools.planner.benchmark.SolverBenchmarkSuite
  • org.drools.planner.examples.cloudbalancing.app.CloudBalancingHelloWorld
  • org.drools.planner.examples.common.app.SolverPerformanceTest
  • org.drools.planner.examples.nqueens.app.NQueensHelloWorld
  • org.drools.planner.webexamples.vehiclerouting.VrpWebAction
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